Craig Frames 1WB3BK 10 by 20-Inch Black Picture Frame, Single White Collage Mat with 4 - 4 by 6-Inch Openings Celebrate and display your cherished memories with our framed collage mats Complete collage kit includes: picture frame, white matting, acrylic facing, cardboard backing and hanging hardware Matting has 4 - 4 by 6-inch openings (actual opening size: 3.5 by 5.5-inch) Frame moulding is 1 inch wide; black; smooth wrap finish; wood composite material Matting is .05 inches thick; white with cream core; pH neutral; bevel cut openings